Solute Redistribution Resulting in Growth of Primary Silicon in Cast Hypoeutectic Al-Si Alloys

摘要：

　　The experimental data present that primary silicon is precipitated from eutectic and hypoeutectic A1-Si alloy melts.It attributes to solute redistribution on the chemical driving force.Si atoms are easy to segregate to form Si-Si clusters,resulting in primary silicon precipitated from hypereutectic Al-Si alloy.Another reason is that primary silicon is precipitated from solid-liquid interface front once solute concentration in the solidification front exceeds eutectic composition.Solute redistribution equations are derivate from Jackson-Chalmers equation.The third reason is that precious little impurity turn Heterogeneous Nucleation of Si atoms.

关键词： Aluminum alloys Silicon Solidification Crystal growth Solute redistribution

作者: Shouren Wang Yingzi Wang Liying Yang Ru Ma Yong Wang

作者单位: School of Mechanical Engineering, University of Jinan, Jinan, Shandong, 250022, China School of Materials Science and Engineering, University of Jinan, Jinan, Shandong, 250022, China School of Physics Science, University of Jinan, Jinan,Shandong, 250022, China

会议类型: 国际会议

会议名称: the Second International Conference on Frontiers of Manufacturing and Design Science(第二届制造与设计科学国际会议(ICFMD 2011))

会议地点: 台湾

会议语种:英文

页码: 367-371

在线出版日期: 2011-12-11（万方平台首次上网日期，不代表论文的发表时间）